/*
 * Copyright 2013-2019 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.github.dunwu.javadb.mongodb.springboot.aggregation;

import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.repository.Aggregation;
import org.springframework.data.repository.CrudRepository;

import java.util.List;

/**
 * A repository interface assembling CRUD functionality as well as the API to invoke the methods implemented manually.
 * @author Thomas Darimont
 * @author Oliver Gierke
 * @author Christoph Strobl
 */
public interface OrderRepository extends CrudRepository<Order, String>, OrderRepositoryCustom {

    @Aggregation("{ $group : { _id : $customerId, total : { $sum : 1 } } }")
    List<OrdersPerCustomer> totalOrdersPerCustomer(Sort sort);

    @Aggregation(pipeline = {"{ $match : { customerId : ?0 } }", "{ $count : total }"})
    Long totalOrdersForCustomer(String customerId);

}
